Improved error message when a feature is not active

[jorgecarleitao]

This allows to match for an error type related to the lack of a feature installed (e.g. to propagate the message to the end user).

Backward incompatible change:

• ParquetError got a new variant and became #[non_exhaustive], thereby forbidding a complete match (to make it future proof against changes to it)

[codecov-commenter]

Codecov Report

Merging #69 (ca35b2a) into main (96596e6) will increase coverage by 0.37%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main      #69      +/-   ##
==========================================
+ Coverage   69.18%   69.56%   +0.37%     
==========================================
  Files          66       66              
  Lines        3661     3703      +42     
==========================================
+ Hits         2533     2576      +43     
+ Misses       1128     1127       -1     

Impacted Files	Coverage Δ
src/compression.rs	89.70% <ø> (ø)
src/error.rs	22.22% <0.00%> (-6.35%)	⬇️
src/read/mod.rs	94.59% <0.00%> (+3.19%)	⬆️

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